hi Trent,
i'll try to say it nicely

but sorry, to answer your question, neraly everything...

- first, you form in the chunk doesn't send anything, then why is it a form ?
- second, the way you've written the snippet is, sorry again, but, well, so bad

and, once more, you will not retreive the values you're lookig for
<form method='get'>
<input type='submit' name='today' value='today' />
<input type='submit' name='tomorrow' value='tomorrow' />
</form>
except from the fact this should not be written this way in a snippet, this form doesn't send submit like you seem to beleive (at the end of the same snippet...) but today or tomorrow as $_GET indexes and values
this form needs an action (event if by default it will be the page itself
you should not retreive and deal with the sent values in the same snippet as you return the form (honestly, i wonder why you put the form in the snippet)
i can't see where the $today and $tomorrow are used
how does ditto know what var to deal with ?
and so on
i think that if you just gave us a little idea of what you want to achieve, without writing it for you, we may at least help you dispatch the things to do in the right parts to use
sorry again
have swing